To himself



dimitri @attira ELITHAYER, OF WGRGESTER, MASSACHUSETTS, ASSIGNOR T0 IIIMSELF AND MARSHALL COWING, 0F NEW YORK CITY.

Lette/rs .Patent No. 97 ,001, dated Norember 16, 1869.

IMPROVE!) MOD OF COLLECTING AND STORNG GARBONIC ACID FOR EXTINGUISHING Hangs.

The Schedule referred to in. these Letters Patent and making part ofthe same.

To all whom it' may concern:

Beit k'nown that I, ELI THAYER, of the city and county of iVorcester, in the State of AMassachusetts,

have invented a new and useful Method of Utilizing Carbonio-Acid Gasand similar' gases; and I do hereby declare that-the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

'lhe object of my invention is to collect, store, and

ment of a city, and at the same time avoid the immense loss in goods and merchandise which, under the present method of extinguishing lires, is necessarily occasioned by their being drenched with water.

Ehe nature of this invention consists in collecting, by means ot' any suitable apparatus, the carbonicaed gas, and similargases possessing the property of extinguishing iire, generatedsby natural causes, in

' dwellings, stores, and other buildings, and conducting it into a suitable receiver or reservoir, by means ot' pipes attached to the furnace, stove, or range, or with the chimney of the building, this supply of gas being for the purpose of extinguishing tires which ma y occur-either by accident or by incemiiarism.

It also consists in providing a number oi' other receivers or reservoirs, of any suitable size and form, into which the gas is forced, by suitable mea-ns, from the receive already mentioned. These are made very strong, so as to be capable of bearing a pressure of one hundred pounds or more to the square inch, and are connected together by suitable pipes, provided with stop-cocks, or other device for regulating the iow of gas from and to each other.

In these last-mentioned receivers, the gas is placed under pressure, so that it may be forced through suitable pipes to the place where it is required for extinguishing a re; and when the supply of gas, generated as above described, is found insutiicient, the gas may be generated.artificially for these receivers, by means of the proper ingredients for producing such gas.

These receivers are of such number and capacity as may be requisite to supply a block, a number of blocks, or a whole city.

The gure represents a side elevation ot' odo form of apparatus employed for carrying out the object and design of my invention. l

A may represent a furnace, stove, or similarapparatus, in which the gas is generated by combustion, and from which it is conducted, by the` pipe B, constructed of suitable size and proper materials, into the receiver' C, where it is collected.

This receiver may be made of any'suitable material, and is provided with an aperture, a, at or near the. top, for the purpose oi' allowing the lighter' gases and atmospheric air to escape ns thc receiver becomes iilled with the heavy gas.

Int-o this aperture a pipe may be inserted, it' desired, for the purpose ot' carrying away the air and lighter gasesg. or one end of the pipe B may be inserted into the chimney of the building, for the purpose of, drawing therefrom the carbonio-acid gas and similar gases into the receiver C, as shown by the dotted lines. l

From this receiver C, the gas is forced into other receivers, I), through pipes and by suitable means.

The receivers I) are made ol' any suitable form, very strong, and of such number and capacity as may be required to hold a suiiic-ient quantity of gas for extinguishing any tirethat may occur in the block or blocks ot buildings which they are intended to supply.

rlhe gas in these receivers is under pressure, so that it may be forced to any required point or locality, by means of 'pipes ITF inserted therein, and passing through the walls into the various rooms or apartments of the buildings.

It willbe seen, that by this means, a series of such receivers, connected together by pipes, may be constructed so as to supply a whole city.

Then the supply of gas thus collected is found insuliicient, the ga-s may be generated for the receiv ers I) artificially, by chemical compounds, or lsuitable ingredients, such as marble-dust and sulphuric acid.

The advantages ot' my invention are evident, i'or the reason that this gas, introduced into a room or store, will extinguish any lire therein, without damaging the goods contained in it, and thatthis senor do I confine myself to tbe use of carbonic-aeid carbonio-acid (gas, or other equivalent gas, in one or gas only, as other gases possessing similar properties more reservoirs, under pressure, and connecting said may be employed so as to produce the same results; reservoirs with suitable pipes, as described.

but ELI THAYER.

What I claim as new, and desire to secure by Letters Patent of the United States, isf- Witnesses:

The process, substantially 4`es herein described, of O. ROGERS, extinguishing fires, the same consisting in storing the A. BASSETT. 

